| 摘要 |
PROBLEM TO BE SOLVED: To provide a base contributive to solve environmental problems in which total strength is enhanced and torsion is eliminated while reducing the material cost and machining cost significantly. SOLUTION: The base comprises a first structural body 10 having a rising part 12 around a plate body 11, and a second structural body 20 having a rising part 22 around a plate body 21.
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